Nokia Mobile Phones Limited

Spyder Navigations LLC

Janne Jormalainen

Jari Pekka H&auml;m&auml;l&auml;inen

Behruz Vazvan

Jari Hämäläinen

A method for transmitting speech and data simultaneously on a circuit switched two-way connection of a mobile communications system, which transfers speech and other data by use of discontinuous transmission, DTX, in which the sending is discontinued when it is indicated, that there is no information to be sent, and continued when it is indicated that there is information to be sent. In accordance with the method of the invention, the data to be sent are stored in buffer means and wait to be sent. When it is indicated, that there is no more information to be sent, the data stored in buffer means are sent until there is no more data to be sent or until it is indicated that there is information, speech or other data, to be sent, in which case the sending of data is discontinued and the sending of speech or other data is re-started. So the transfer of data takes place as a background process during transfer of speech or other data. The data are arranged into frame structures while being stored in the buffer. The data are separated, for example, by identifiers placed at the beginning of the frame structures. The same traffic channel can be used for transferring both data and speech or other data. An alternative is to transfer the data on a fast associated control channel that belongs to the same circuit switched connection as the traffic channel.

Simultaneous transmission of speech and data on a mobile communications system

The invention relates to a method for transmitting speech and data simultaneously on a circuit switched two-way connection of a mobile communications system, which transfers speech and other data by use of discontinuous transmission, DTX, in which the sending is discontinued when it is indicated that there is no information to be sent, and continued when it is indicated that there is information to be sent. In accordance with the method of the invention, the data to be sent are stored in buffer means and wait to be sent. When it is indicated that there is no more information to be sent, the data stored in buffer means are sent until there is no more data to be sent or until it is indicated that there is information, speech or other data to be sent, in which case the sending of data is discontinued and the sending of speech or other data is re-started. So the transfer of data takes place as a background process during transfer of speech or other data. The data are arranged into frame structures while being stored in the buffer. The data are separated, for example, by identifiers placed at the beginning of the frame structures. The same traffic channel can be used for transferring both data and speech or other data. An alternative is to transfer the data on a fast associated control channel that belongs to the same circuit switched connection as the traffic channel.

The invention relates to a mobile communication entity, which combines several mobile communication networks, which can be part of different mobile communication systems ( ), and in which a mobile terminal can operate and establish connections to a receiver via said mobile communication networks. The mobile terminal selects a first mobile communication network based on a certain criterion or criteria, and establishes a first connection to the receiver using the first mobile communication network. After that the mobile terminal selects a second mobile communication network based on a certain criterion or criteria and establishes a second connection to the receiver. After the second connection has been successfully established, the mobile terminal disconnects the first connection.

Growing community of inventors

Tampere, Finland

Janne Jormalainen